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Semaphore (programming) In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple threads and avoid critical section problems in a concurrent system such as a multitasking operating system. Semaphores are a type of synchronization primitive.
Optimistic concurrency control ( OCC ), also known as optimistic locking, is a non-locking concurrency control method applied to transactional systems such as relational database management systems and software transactional memory. OCC assumes that multiple transactions can frequently complete without interfering with each other.
A page table is a data structure used by a virtual memory system in a computer to store mappings between virtual addresses and physical addresses. Virtual addresses are used by the program executed by the accessing process, while physical addresses are used by the hardware, or more specifically, by the random-access memory (RAM) subsystem.
Process creation in UNIX and Linux is done through fork() or clone() system calls. There are several steps involved in process creation. There are several steps involved in process creation. The first step is the validation of whether the parent process has sufficient authorization to create a process.
A federated database system ( FDBS) is a type of meta- database management system (DBMS), which transparently maps multiple autonomous database systems into a single federated database. The constituent databases are interconnected via a computer network and may be geographically decentralized. Since the constituent database systems remain ...
UTS (UNIX Time-Sharing) namespaces allow a single system to appear to have different host and domain names to different processes. When a process creates a new UTS namespace, the hostname and domain of the new UTS namespace are copied from the corresponding values in the caller's UTS namespace. [9]
Relocation (computing) Relocation is the process of assigning load addresses for position-dependent code and data of a program and adjusting the code and data to reflect the assigned addresses. [ 1][ 2] Prior to the advent of multiprocess systems, and still in many embedded systems, the addresses for objects are absolute starting at a known ...
Process (computing) In computing, a process is the instance of a computer program that is being executed by one or many threads. There are many different process models, some of which are light weight, but almost all processes (even entire virtual machines) are rooted in an operating system (OS) process which comprises the program code ...